How to recache a simulation
For Fluids:
Select the domain object -&gt; Physics tab -&gt; Fluid -&gt; Settings -&gt; Free Data
Then don't forget to re-bake the Mesh and Particles.
For Cloth:
Select a cloth object -&gt; Physics tab -&gt; Cloth -&gt; Cache -&gt; Delete All Bakes
Then Bake again.